I need 3 rows of seats and more towing power....

Old thread but I figured I would give it a small update. Even with a fresh engine in the denali it just struggled too much. Its just not a good towing setup. So, its gone and I now have a 2005 8.1 burb. I've only towed a few miles with it so far but it is a night and day difference. You can tell this is a purpose built vehicle. I will give it a good test this weekend on the same trip I took with the denali. Something tells me it will pass with flying colors.